This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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adj. not fed

adj. unsupported

Not fed; not supplied with food; not nourished or sustained.

adj. not given support

adj. not fed

"Now, the recipe calls for the starter to be "unfed" but I think if you are like me and you have a dormant starter i.e. a starter that hasn't been baked with in a while You will want to feed it at least once before using it just to wake it up."

unfueled    malnourished   

unexercised    unrewarded    unhelped    hungry-looking    wind-aided    uneaten    unsatisfiable    recognize    unordered    unsworn